From: "Brian B. Riley" <brianbr@together.net>
Date: Mon, 6 Oct 1997 05:02:08 +0800
To: "Jim Choate" <cypherpunks@ssz.com>
Subject: Re: Traffic Analysis (fwd)
Message-ID: <199710052028.QAA05930@mx02.together.net>
MIME-Version: 1.0
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On 10/5/97 1:18 PM, Jim Choate (ravage@ssz.com)  passed this wisdom:

>> Subject: Re: Traffic Analysis (fwd)
>> Date: Sun, 5 Oct 97 11:59:53 -0400
>> 
>> On 10/3/97 10:49 AM, Jim Choate (ravage@ssz.com)  passed this
>> wisdom:
>> 
>>>If the MTBF for a remailer is n then the MTBF for m remailers
>>>is n*m. Inother words the remailer chain gets less reliable as
>>>it gets longer.  
>> 
>>   Jim, you want to take a look at that "n*m" again ... it
>>doesn't wash. means MTBF goes *up* which means *more* reliable.
>
>Remember n is a fraction, failures/time_period ...
>
>If your MTBF is 1 failure per year for each system and you have 10
>systems your MTBF is 10 failures per year. Looks like multiplication
>to me....

 Maybe I have been away from hardcore engineering for too long, but
last time I checked MTBF (Mean Time Between Failures) is measured in
time (seconds, minutes, hours etc) not in failures per year that would
be called 'failure rate'


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